SUNFLOWER FAMILY 595 
A variable genus, in which nearly 1000 species have been described, native of both hemispheres 
Ly <, My 
A j . Type species, 
1 native species, perhaps Ly a i degree in H. horridum, ape ve field and experimental studies should 
be made to at ive at an understa nding of true r etatic Sots nahi ips. Then so. * e names here listed as synonyms may 
be found to represent —- bislogical entities te least at the Subspecific level. Probably in the albertinum- 
tleri-cynog lo mplex, a situation exists compar. cin to that which has been demonstrated to occur in the 
polyploid apomictic pond 9 ne yi of the oe us 5 uro 
re not stoloniferous; native s 
ith long 
eaves Goltwad ng oety long bates tiated ‘iarite of the ae River Gorge. 
cies 
sal st sae al — rather small os pico sainraeene those . rs many and mostly larger. 
Ste etose lon 
“Lea 
longiberbe. 
T.eaves essentially glabrous; plants widely distributed in Canada and northern United Asap 
nadense. 
Stems without long setose hairs; leaves four to twelve times as long as wide. 
Basal po subbasal leaves the ri 
arkedly reduced upward 
Stellate cueastasne: lacki 
wers white, 19-30 p per head; plants 3-12 dm. high; widely seen in Fagen t Pomoatg States. 
is pe mbellatum. 
rger, persistent, those of midstem few or none, progressively and sometimes 
Flowers yellow, 5—15 per head; plants 1-3 dm. high; restricted to the ‘Siskigon region. 
. H. bolanderi. 
sets pubescence present (sometimes only on the inflorescence), sparse or dense 
nts canescent throughout with a a stellate osaaan pelo elie with long setose hairs 
on the lower leaves.) ae Ai. greene. 
Stell restricted to leaves or inflorescence, obsc 
MNearl¥ all leaves art but conspicuously sinuate-dentate; plants of aan fgg ect and southern 
Califor 3. 
Leaves all entire or a few obscurely denticulate; plants not of west-central and stick Cali- 
fornia. 
Basal i eo glabrous or if at all pubescent lacking setose hairs; err. Baggs stemmed 
plants, mostly of moist mountainous si tions, res = & cile. 
Basal and pent eaves when present dens or apeesely covered with ‘i setose hairs; 
plants principally of yp Bh open or set d area: 
Heads (5)10-12-flowered, the involucres narrow; plants crinate, Mendes, Te 1-3 — high. 
0 
Heads ae 50-flowered, the involucres broad; plants if crinate rather stout, %. $- 7 dm. 
Hathess sparsely to moderately long-setose above (occasional on involucres) and 
sometimes glaucous; plants of Cascade, Tiikiners, ry Sigre Bl Megs ranges, 
Herbage egg long-setose shove d_ below, — 3, glawcous ds tea ae of the 
Cascade, Siskiyou, sis Gos rthe a Sierra es. 
Involucres and stems pega sparsely long- a meee ney spl 
. H. cynoglossoides. 
Involucres and sometimes the stems crinate, sss dai ‘if at ai glandular. 
Be d 3. H. albertinum. 
tol ; introduced spec 
Inflorescence o él 5—10 heads, orange- es orange-red-flowered. 
Heads solitary, yellow-flowered. 
13. H. aurantiacum. 
14. H, pilosella. 
6031. Lactuca biennis 6032. Lactuca muralis 
